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- //@line 39 "/tmp/buildd/iceweasel-10.0.12esr/browser/components/feeds/src/FeedConverter.js"
-
- Components.utils.import("resource://gre/modules/XPCOMUtils.jsm");
- Components.utils.import("resource://gre/modules/debug.js");
-
- const Cc = Components.classes;
- const Ci = Components.interfaces;
- const Cr = Components.results;
-
- function LOG(str) {
- dump("*** " + str + "\n");
- }
-
- const FS_CONTRACTID = "@mozilla.org/browser/feeds/result-service;1";
- const FPH_CONTRACTID = "@mozilla.org/network/protocol;1?name=feed";
- const PCPH_CONTRACTID = "@mozilla.org/network/protocol;1?name=pcast";
-
- const TYPE_MAYBE_FEED = "application/vnd.mozilla.maybe.feed";
- const TYPE_MAYBE_VIDEO_FEED = "application/vnd.mozilla.maybe.video.feed";
- const TYPE_MAYBE_AUDIO_FEED = "application/vnd.mozilla.maybe.audio.feed";
- const TYPE_ANY = "*/*";
-
- const FEEDHANDLER_URI = "about:feeds";
-
- const PREF_SELECTED_APP = "browser.feeds.handlers.application";
- const PREF_SELECTED_WEB = "browser.feeds.handlers.webservice";
- const PREF_SELECTED_ACTION = "browser.feeds.handler";
- const PREF_SELECTED_READER = "browser.feeds.handler.default";
-
- const PREF_VIDEO_SELECTED_APP = "browser.videoFeeds.handlers.application";
- const PREF_VIDEO_SELECTED_WEB = "browser.videoFeeds.handlers.webservice";
- const PREF_VIDEO_SELECTED_ACTION = "browser.videoFeeds.handler";
- const PREF_VIDEO_SELECTED_READER = "browser.videoFeeds.handler.default";
-
- const PREF_AUDIO_SELECTED_APP = "browser.audioFeeds.handlers.application";
- const PREF_AUDIO_SELECTED_WEB = "browser.audioFeeds.handlers.webservice";
- const PREF_AUDIO_SELECTED_ACTION = "browser.audioFeeds.handler";
- const PREF_AUDIO_SELECTED_READER = "browser.audioFeeds.handler.default";
-
- function getPrefAppForType(t) {
- switch (t) {
- case Ci.nsIFeed.TYPE_VIDEO:
- return PREF_VIDEO_SELECTED_APP;
-
- case Ci.nsIFeed.TYPE_AUDIO:
- return PREF_AUDIO_SELECTED_APP;
-
- default:
- return PREF_SELECTED_APP;
- }
- }
-
- function getPrefWebForType(t) {
- switch (t) {
- case Ci.nsIFeed.TYPE_VIDEO:
- return PREF_VIDEO_SELECTED_WEB;
-
- case Ci.nsIFeed.TYPE_AUDIO:
- return PREF_AUDIO_SELECTED_WEB;
-
- default:
- return PREF_SELECTED_WEB;
- }
- }
-
- function getPrefActionForType(t) {
- switch (t) {
- case Ci.nsIFeed.TYPE_VIDEO:
- return PREF_VIDEO_SELECTED_ACTION;
-
- case Ci.nsIFeed.TYPE_AUDIO:
- return PREF_AUDIO_SELECTED_ACTION;
-
- default:
- return PREF_SELECTED_ACTION;
- }
- }
-
- function getPrefReaderForType(t) {
- switch (t) {
- case Ci.nsIFeed.TYPE_VIDEO:
- return PREF_VIDEO_SELECTED_READER;
-
- case Ci.nsIFeed.TYPE_AUDIO:
- return PREF_AUDIO_SELECTED_READER;
-
- default:
- return PREF_SELECTED_READER;
- }
- }
-
- function safeGetCharPref(pref, defaultValue) {
- var prefs =
- Cc["@mozilla.org/preferences-service;1"].
- getService(Ci.nsIPrefBranch);
- try {
- return prefs.getCharPref(pref);
- }
- catch (e) {
- }
- return defaultValue;
- }
-
- function FeedConverter() {
- }
- FeedConverter.prototype = {
- classID: Components.ID("{229fa115-9412-4d32-baf3-2fc407f76fb1}"),
-
- /**
- * This is the downloaded text data for the feed.
- */
- _data: null,
-
- /**
- * This is the object listening to the conversion, which is ultimately the
- * docshell for the load.
- */
- _listener: null,
-
- /**
- * Records if the feed was sniffed
- */
- _sniffed: false,
-
- /**
- * See nsIStreamConverter.idl
- */
- convert: function FC_convert(sourceStream, sourceType, destinationType,
- context) {
- throw Cr.NS_ERROR_NOT_IMPLEMENTED;
- },
-
- /**
- * See nsIStreamConverter.idl
- */
- asyncConvertData: function FC_asyncConvertData(sourceType, destinationType,
- listener, context) {
- this._listener = listener;
- },
-
- /**
- * Whether or not the preview page is being forced.
- */
- _forcePreviewPage: false,
-
- /**
- * Release our references to various things once we're done using them.
- */
- _releaseHandles: function FC__releaseHandles() {
- this._listener = null;
- this._request = null;
- this._processor = null;
- },
-
- /**
- * See nsIFeedResultListener.idl
- */
- handleResult: function FC_handleResult(result) {
- // Feeds come in various content types, which our feed sniffer coerces to
- // the maybe.feed type. However, feeds are used as a transport for
- // different data types, e.g. news/blogs (traditional feed), video/audio
- // (podcasts) and photos (photocasts, photostreams). Each of these is
- // different in that there's a different class of application suitable for
- // handling feeds of that type, but without a content-type differentiation
- // it is difficult for us to disambiguate.
- //
- // The other problem is that if the user specifies an auto-action handler
- // for one feed application, the fact that the content type is shared means
- // that all other applications will auto-load with that handler too,
- // regardless of the content-type.
- //
- // This means that content-type alone is not enough to determine whether
- // or not a feed should be auto-handled. This means that for feeds we need
- // to always use this stream converter, even when an auto-action is
- // specified, not the basic one provided by WebContentConverter. This
- // converter needs to consume all of the data and parse it, and based on
- // that determination make a judgment about type.
- //
- // Since there are no content types for this content, and I'm not going to
- // invent any, the upshot is that while a user can set an auto-handler for
- // generic feed content, the system will prevent them from setting an auto-
- // handler for other stream types. In those cases, the user will always see
- // the preview page and have to select a handler. We can guess and show
- // a client handler, but will not be able to show web handlers for those
- // types.
- //
- // If this is just a feed, not some kind of specialized application, then
- // auto-handlers can be set and we should obey them.
- try {
- var feedService =
- Cc["@mozilla.org/browser/feeds/result-service;1"].
- getService(Ci.nsIFeedResultService);
- if (!this._forcePreviewPage && result.doc) {
- var feed = result.doc.QueryInterface(Ci.nsIFeed);
- var handler = safeGetCharPref(getPrefActionForType(feed.type), "ask");
-
- if (handler != "ask") {
- if (handler == "reader")
- handler = safeGetCharPref(getPrefReaderForType(feed.type), "bookmarks");
- switch (handler) {
- case "web":
- var wccr =
- Cc["@mozilla.org/embeddor.implemented/web-content-handler-registrar;1"].
- getService(Ci.nsIWebContentConverterService);
- if ((feed.type == Ci.nsIFeed.TYPE_FEED &&
- wccr.getAutoHandler(TYPE_MAYBE_FEED)) ||
- (feed.type == Ci.nsIFeed.TYPE_VIDEO &&
- wccr.getAutoHandler(TYPE_MAYBE_VIDEO_FEED)) ||
- (feed.type == Ci.nsIFeed.TYPE_AUDIO &&
- wccr.getAutoHandler(TYPE_MAYBE_AUDIO_FEED))) {
- wccr.loadPreferredHandler(this._request);
- return;
- }
- break;
-
- default:
- LOG("unexpected handler: " + handler);
- // fall through -- let feed service handle error
- case "bookmarks":
- case "client":
- try {
- var title = feed.title ? feed.title.plainText() : "";
- var desc = feed.subtitle ? feed.subtitle.plainText() : "";
- feedService.addToClientReader(result.uri.spec, title, desc, feed.type);
- return;
- } catch(ex) { /* fallback to preview mode */ }
- }
- }
- }
-
- var ios =
- Cc["@mozilla.org/network/io-service;1"].
- getService(Ci.nsIIOService);
- var chromeChannel;
-
- // If there was no automatic handler, or this was a podcast,
- // photostream or some other kind of application, show the preview page
- // if the parser returned a document.
- if (result.doc) {
-
- // Store the result in the result service so that the display
- // page can access it.
- feedService.addFeedResult(result);
-
- // Now load the actual XUL document.
- var chromeURI = ios.newURI(FEEDHANDLER_URI, null, null);
- chromeChannel = ios.newChannelFromURI(chromeURI, null);
- chromeChannel.originalURI = result.uri;
- }
- else
- chromeChannel = ios.newChannelFromURI(result.uri, null);
-
- chromeChannel.loadGroup = this._request.loadGroup;
- chromeChannel.asyncOpen(this._listener, null);
- }
- finally {
- this._releaseHandles();
- }
- },
-
- /**
- * See nsIStreamListener.idl
- */
- onDataAvailable: function FC_onDataAvailable(request, context, inputStream,
- sourceOffset, count) {
- if (this._processor)
- this._processor.onDataAvailable(request, context, inputStream,
- sourceOffset, count);
- },
-
- /**
- * See nsIRequestObserver.idl
- */
- onStartRequest: function FC_onStartRequest(request, context) {
- var channel = request.QueryInterface(Ci.nsIChannel);
-
- // Check for a header that tells us there was no sniffing
- // The value doesn't matter.
- try {
- var httpChannel = channel.QueryInterface(Ci.nsIHttpChannel);
- // Make sure to check requestSucceeded before the potentially-throwing
- // getResponseHeader.
- if (!httpChannel.requestSucceeded) {
- // Just give up, but don't forget to cancel the channel first!
- request.cancel(0x804b0002); // NS_BINDING_ABORTED
- return;
- }
- var noSniff = httpChannel.getResponseHeader("X-Moz-Is-Feed");
- }
- catch (ex) {
- this._sniffed = true;
- }
-
- this._request = request;
-
- // Save and reset the forced state bit early, in case there's some kind of
- // error.
- var feedService =
- Cc["@mozilla.org/browser/feeds/result-service;1"].
- getService(Ci.nsIFeedResultService);
- this._forcePreviewPage = feedService.forcePreviewPage;
- feedService.forcePreviewPage = false;
-
- // Parse feed data as it comes in
- this._processor =
- Cc["@mozilla.org/feed-processor;1"].
- createInstance(Ci.nsIFeedProcessor);
- this._processor.listener = this;
- this._processor.parseAsync(null, channel.URI);
-
- this._processor.onStartRequest(request, context);
- },
-
- /**
- * See nsIRequestObserver.idl
- */
- onStopRequest: function FC_onStopRequest(request, context, status) {
- if (this._processor)
- this._processor.onStopRequest(request, context, status);
- },
-
- /**
- * See nsISupports.idl
- */
- QueryInterface: function FC_QueryInterface(iid) {
- if (iid.equals(Ci.nsIFeedResultListener) ||
- iid.equals(Ci.nsIStreamConverter) ||
- iid.equals(Ci.nsIStreamListener) ||
- iid.equals(Ci.nsIRequestObserver)||
- iid.equals(Ci.nsISupports))
- return this;
- throw Cr.NS_ERROR_NO_INTERFACE;
- },
- };
-
- /**
- * Keeps parsed FeedResults around for use elsewhere in the UI after the stream
- * converter completes.
- */
- function FeedResultService() {
- }
-
- FeedResultService.prototype = {
- classID: Components.ID("{2376201c-bbc6-472f-9b62-7548040a61c6}"),
-
- /**
- * A URI spec -> [nsIFeedResult] hash. We have to keep a list as the
- * value in case the same URI is requested concurrently.
- */
- _results: { },
-
- /**
- * See nsIFeedResultService.idl
- */
- forcePreviewPage: false,
-
- /**
- * See nsIFeedResultService.idl
- */
- addToClientReader: function FRS_addToClientReader(spec, title, subtitle, feedType) {
- var prefs =
- Cc["@mozilla.org/preferences-service;1"].
- getService(Ci.nsIPrefBranch);
-
- var handler = safeGetCharPref(getPrefActionForType(feedType), "bookmarks");
- if (handler == "ask" || handler == "reader")
- handler = safeGetCharPref(getPrefReaderForType(feedType), "bookmarks");
-
- switch (handler) {
- case "client":
- var clientApp = prefs.getComplexValue(getPrefAppForType(feedType), Ci.nsILocalFile);
-
- // For the benefit of applications that might know how to deal with more
- // URLs than just feeds, send feed: URLs in the following format:
- //
- // http urls: replace scheme with feed, e.g.
- // http://foo.com/index.rdf -> feed://foo.com/index.rdf
- // other urls: prepend feed: scheme, e.g.
- // https://foo.com/index.rdf -> feed:https://foo.com/index.rdf
- var ios =
- Cc["@mozilla.org/network/io-service;1"].
- getService(Ci.nsIIOService);
- var feedURI = ios.newURI(spec, null, null);
- if (feedURI.schemeIs("http")) {
- feedURI.scheme = "feed";
- spec = feedURI.spec;
- }
- else
- spec = "feed:" + spec;
-
- // Retrieving the shell service might fail on some systems, most
- // notably systems where GNOME is not installed.
- try {
- var ss =
- Cc["@mozilla.org/browser/shell-service;1"].
- getService(Ci.nsIShellService);
- ss.openApplicationWithURI(clientApp, spec);
- } catch(e) {
- // If we couldn't use the shell service, fallback to using a
- // nsIProcess instance
- var p =
- Cc["@mozilla.org/process/util;1"].
- createInstance(Ci.nsIProcess);
- p.init(clientApp);
- p.run(false, [spec], 1);
- }
- break;
-
- default:
- // "web" should have been handled elsewhere
- LOG("unexpected handler: " + handler);
- // fall through
- case "bookmarks":
- var wm =
- Cc["@mozilla.org/appshell/window-mediator;1"].
- getService(Ci.nsIWindowMediator);
- var topWindow = wm.getMostRecentWindow("navigator:browser");
- topWindow.PlacesCommandHook.addLiveBookmark(spec, title, subtitle);
- break;
- }
- },
-
- /**
- * See nsIFeedResultService.idl
- */
- addFeedResult: function FRS_addFeedResult(feedResult) {
- NS_ASSERT(feedResult.uri != null, "null URI!");
- NS_ASSERT(feedResult.uri != null, "null feedResult!");
- var spec = feedResult.uri.spec;
- if(!this._results[spec])
- this._results[spec] = [];
- this._results[spec].push(feedResult);
- },
-
- /**
- * See nsIFeedResultService.idl
- */
- getFeedResult: function RFS_getFeedResult(uri) {
- NS_ASSERT(uri != null, "null URI!");
- var resultList = this._results[uri.spec];
- for (var i in resultList) {
- if (resultList[i].uri == uri)
- return resultList[i];
- }
- return null;
- },
-
- /**
- * See nsIFeedResultService.idl
- */
- removeFeedResult: function FRS_removeFeedResult(uri) {
- NS_ASSERT(uri != null, "null URI!");
- var resultList = this._results[uri.spec];
- if (!resultList)
- return;
- var deletions = 0;
- for (var i = 0; i < resultList.length; ++i) {
- if (resultList[i].uri == uri) {
- delete resultList[i];
- ++deletions;
- }
- }
-
- // send the holes to the end
- resultList.sort();
- // and trim the list
- resultList.splice(resultList.length - deletions, deletions);
- if (resultList.length == 0)
- delete this._results[uri.spec];
- },
-
- createInstance: function FRS_createInstance(outer, iid) {
- if (outer != null)
- throw Cr.NS_ERROR_NO_AGGREGATION;
- return this.QueryInterface(iid);
- },
-
- QueryInterface: function FRS_QueryInterface(iid) {
- if (iid.equals(Ci.nsIFeedResultService) ||
- iid.equals(Ci.nsIFactory) ||
- iid.equals(Ci.nsISupports))
- return this;
- throw Cr.NS_ERROR_NOT_IMPLEMENTED;
- },
- };
-
- /**
- * A protocol handler that attempts to deal with the variant forms of feed:
- * URIs that are actually either http or https.
- */
- function GenericProtocolHandler() {
- }
- GenericProtocolHandler.prototype = {
- _init: function GPH_init(scheme) {
- var ios =
- Cc["@mozilla.org/network/io-service;1"].
- getService(Ci.nsIIOService);
- this._http = ios.getProtocolHandler("http");
- this._scheme = scheme;
- },
-
- get scheme() {
- return this._scheme;
- },
-
- get protocolFlags() {
- return this._http.protocolFlags;
- },
-
- get defaultPort() {
- return this._http.defaultPort;
- },
-
- allowPort: function GPH_allowPort(port, scheme) {
- return this._http.allowPort(port, scheme);
- },
-
- newURI: function GPH_newURI(spec, originalCharset, baseURI) {
- // Feed URIs can be either nested URIs of the form feed:realURI (in which
- // case we create a nested URI for the realURI) or feed://example.com, in
- // which case we create a nested URI for the real protocol which is http.
-
- var scheme = this._scheme + ":";
- if (spec.substr(0, scheme.length) != scheme)
- throw Cr.NS_ERROR_MALFORMED_URI;
-
- var prefix = spec.substr(scheme.length, 2) == "//" ? "http:" : "";
- var inner = Cc["@mozilla.org/network/io-service;1"].
- getService(Ci.nsIIOService).newURI(spec.replace(scheme, prefix),
- originalCharset, baseURI);
- var netutil = Cc["@mozilla.org/network/util;1"].getService(Ci.nsINetUtil);
- const URI_INHERITS_SECURITY_CONTEXT = Ci.nsIProtocolHandler
- .URI_INHERITS_SECURITY_CONTEXT;
- if (netutil.URIChainHasFlags(inner, URI_INHERITS_SECURITY_CONTEXT))
- throw Cr.NS_ERROR_MALFORMED_URI;
-
- var uri = netutil.newSimpleNestedURI(inner);
- uri.spec = inner.spec.replace(prefix, scheme);
- return uri;
- },
-
- newChannel: function GPH_newChannel(aUri) {
- var inner = aUri.QueryInterface(Ci.nsINestedURI).innerURI;
- var channel = Cc["@mozilla.org/network/io-service;1"].
- getService(Ci.nsIIOService).newChannelFromURI(inner, null);
- if (channel instanceof Components.interfaces.nsIHttpChannel)
- // Set this so we know this is supposed to be a feed
- channel.setRequestHeader("X-Moz-Is-Feed", "1", false);
- channel.originalURI = aUri;
- return channel;
- },
-
- QueryInterface: function GPH_QueryInterface(iid) {
- if (iid.equals(Ci.nsIProtocolHandler) ||
- iid.equals(Ci.nsISupports))
- return this;
- throw Cr.NS_ERROR_NO_INTERFACE;
- }
- };
-
- function FeedProtocolHandler() {
- this._init('feed');
- }
- FeedProtocolHandler.prototype = new GenericProtocolHandler();
- FeedProtocolHandler.prototype.classID = Components.ID("{4f91ef2e-57ba-472e-ab7a-b4999e42d6c0}");
-
- function PodCastProtocolHandler() {
- this._init('pcast');
- }
- PodCastProtocolHandler.prototype = new GenericProtocolHandler();
- PodCastProtocolHandler.prototype.classID = Components.ID("{1c31ed79-accd-4b94-b517-06e0c81999d5}");
-
- var components = [FeedConverter,
- FeedResultService,
- FeedProtocolHandler,
- PodCastProtocolHandler];
-
-
- const NSGetFactory = XPCOMUtils.generateNSGetFactory(components);
-